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Analog Devices Inc./Maxim Integrated DS1091LUB-025/V+T
- Part No.:
- DS1091LUB-025/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
DS1091LUB-025/V+T.pdf
- Description:
- IC SS CLOCK GENERATOR 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,446
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Product details
Overview
DS1091LUB-025/V+T from Maxim Integrated is a factory-programmed, automotive-grade spread-spectrum oscillator delivering a down-dithered 25.0MHz clock output with ±1.75% frequency accuracy across -40°C to +125°C and 3.0V–3.6V supply. It features pin-selectable dither magnitudes (0%, -2%, -4%, -8%) and dual dither rates, housed in an 8-pin µMAX® package. Used for EMI reduction in automotive infotainment and industrial control timing paths.
For engineers reviewing the DS1091LUB-025/V+T datasheet, DS1091LUB-025/V+T pinout, DS1091LUB-025/V+T application, or DS1091LUB-025/V+T equivalent, key selection criteria include its down-spread dither profile, automotive temperature qualification, 25.0MHz factory-set frequency, and compatibility with low-jitter, high-stability clock distribution in noise-sensitive systems.
Technical Context
The DS1091LUB-025/V+T implements a triangle-wave-modulated master oscillator architecture to generate down-dithered output, where frequency sweeps downward from the nominal 25.0MHz center by programmable percentages. Its dither rate is determined by the DR pin and output frequency band per Table 2 - for 25.0MHz, n = 10, yielding ~12.3kHz (DR = 1) or ~6.1kHz (DR = 0).
It operates exclusively in down-dither mode (DS1091LUB variant), distinguishing it from center-dither DS1091LUA parts. All logic inputs (SEL0, SEL1, DR) are CMOS-compatible with rail-referenced thresholds, and the OUT pin delivers a square-wave signal with <1.2ns rise/fall times into 15pF load, supporting tight timing margins in high-speed digital systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequency | 25.0MHz factory-programmed; fixed center point for down-spread modulation |
| Frequency Accuracy | ±1.75% over full automotive range (-40°C to +125°C, 3.0V–3.6V); ensures timing margin compliance without external calibration |
| Dither Type | Down-dither only (DS1091LUB variant); shifts spectrum energy below 25.0MHz to reduce peak EMI at fundamental and harmonics |
| Dither Magnitude Options | Pin-selectable: 0%, -2%, -4%, or -8% of 25.0MHz; enables trade-off between EMI attenuation depth and system timing tolerance |
| Supply Voltage | 3.0V to 3.6V; compatible with automotive 3.3V domains and tolerant of battery-supply ripple |
| Operating Temperature | -40°C to +125°C; qualified per AEC-Q100 stress requirements for under-hood and dashboard applications |
| Output Rise/Fall Time | 1.02ns / 1.13ns (typical, 12pF load); supports clean edge integrity in high-speed synchronous interfaces |
Pinout & Package
DS1091LUB-025/V+T is packaged in an 8-pin µMAX® (U8+1) surface-mount package, RoHS-compliant and lead(Pb)-free, with exposed pad not connected internally. Pin 1 is OUT; pins 6 and 7 are no-connect (N.C.) and must remain unconnected on PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Spread-spectrum clock output | CMOS-compatible square wave; drives clock trees directly with sub-nanosecond edge rates |
| 2 (VCC) | Power supply input | 3.0V–3.6V supply; requires local 0.01µF + 0.1µF ceramic decoupling per datasheet recommendation |
| 3 (GND) | Ground reference | Substrate-connected ground; must be tied to low-impedance system ground plane |
| 4 (SEL1), 5 (SEL0) | Dither magnitude select inputs | Binary-coded selection of down-dither percentage (0%, -2%, -4%, -8%) per Table 1 |
| 6, 7 (N.C.) | No connection | Internally unconnected; must be left floating or grounded - not routed or loaded |
| 8 (DR) | Dither rate select input | Logic-level input selecting high/low dither frequency (n = 10 → 12.3kHz or 6.1kHz at 25.0MHz) |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed 25.0MHz output | Eliminates need for external frequency-setting components or configuration EEPROM; reduces BOM and layout complexity |
| Down-spread dithering | Shifts spectral energy away from integer multiples of 25.0MHz, lowering peak radiated emissions by up to 14dB vs. fixed-frequency oscillators |
| Automotive temperature qualification (-40°C to +125°C) | Validated for use in engine control units, ADAS domain controllers, and infotainment head units without derating |
| Pin-selectable dither parameters | Enables field-tunable EMI suppression without firmware or hardware change - SEL0/SEL1/DR set at power-on |
| Low-power active operation | 16mA typical supply current at 25.0MHz/3.6V enables thermal compatibility in dense automotive PCB layouts |
Applications
| Automotive Infotainment Head Unit | Industrial PLC Timing Module |
|---|---|
Use Scenario: Clock source for video processor, audio codec, and display interface in a vehicle head unit operating in cabin and under-hood adjacent zones. IC Role / Device Role / Timing Role: Primary spread-spectrum clock generator providing EMI-compliant 25.0MHz reference to multiple synchronous peripherals. Use Value: Down-dithering reduces 25MHz harmonic peaks that interfere with FM radio reception and Bluetooth coexistence, meeting CISPR 25 Class 5 radiated emission limits. |
Use Scenario: Timing reference for real-time I/O scanning and motion control loop in an IP67-rated programmable logic controller cabinet. IC Role / Device Role / Timing Role: Stable, dithered clock source synchronized to fieldbus communication cycles and servo drive PWM generators. Use Value: ±1.75% accuracy over temperature ensures deterministic scan cycle timing; down-spread minimizes conducted noise coupling into analog sensor inputs. |
| POS Terminal Mainboard | LCD Display Timing Controller |
Use Scenario: Clock for ARM-based payment terminal mainboard with USB, EMV contactless, and thermal printer interfaces. IC Role / Device Role / Timing Role: Single-point clock source enabling simultaneous high-speed peripheral operation while passing FCC Part 15B Class B emissions testing. Use Value: Selectable -4% dither magnitude provides optimal EMI reduction at 25MHz without violating setup/hold margins of USB 2.0 PHY clock recovery circuitry. |
Use Scenario: Pixel clock generator for 1080p automotive-grade LCD panel in rear-seat entertainment system. IC Role / Device Role / Timing Role: Low-jitter, spread-spectrum pixel clock driving LVDS transmitter and timing controller ASIC. Use Value: 1.02ns rise time preserves signal integrity across flexible PCB traces; down-dither avoids resonance excitation in metal display bezel structures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar spread-spectrum oscillator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS1091LUB-025/V+ | Same 25.0MHz down-dither function, identical specs, but supplied in cut tape (not tape-and-reel) | No difference in functional deployment; differs only in packaging format and minimum order quantity | Select DS1091LUB-025/V+ for prototyping or low-volume builds requiring manual placement |
| Si5351A-B-GM | Programmable I²C clock generator with 3 outputs; ±50ppm initial accuracy; no integrated spread-spectrum dither (requires external modulation) | Supports multi-frequency generation and dynamic reconfiguration; lacks automotive temp rating and factory-set simplicity | Choose Si5351A-B-GM only when variable clock synthesis or multiple synchronized frequencies are required |
Compared with DS1091LUB-025/V+T, the DS1091LUB-025/V+ offers identical electrical performance but different logistics packaging, while the Si5351A-B-GM trades factory-programmed simplicity and automotive qualification for flexibility and multi-output capability - making DS1091LUB-025/V+T optimal for cost-sensitive, high-volume, EMI-critical single-clock applications.
Availability
DS1091LUB-025/V+T is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLC timing modules, and LCD display timing controllers requiring stable component supply, AEC-Q100-aligned sourcing, and consistent spread-spectrum EMI performance.
Supply support for DS1091LUB-025/V+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated, now part of Analog Devices, designs precision analog, mixed-signal, and timing solutions for automotive, industrial, and communications markets.
The DS1091LUB-025/V+T belongs to the EconOscillator™ family - engineered specifically for EMI reduction in automotive and industrial systems through factory-programmed, pin-configurable spread-spectrum clock generation.
FAQ
What is the factory-programmed output frequency of the DS1091LUB-025/V+T?
The DS1091LUB-025/V+T is factory-programmed to deliver a precise 25.0MHz nominal output frequency. This value is fixed and non-adjustable; the device uses internal trimming to achieve ±0.25% initial accuracy at +25°C, and maintains ±1.75% stability across the full -40°C to +125°C automotive temperature range and 3.0V–3.6V supply voltage.
Does the DS1091LUB-025/V+T support center-spread or only down-spread dithering?
The DS1091LUB-025/V+T supports down-spread dithering only - it is the "LUB" variant, distinct from the "LUA" center-dither version. Its dither magnitude options are 0%, -2%, -4%, or -8% of the 25.0MHz center frequency, selected via SEL0 and SEL1 pins. Center-spread functionality is not implemented in this part number and cannot be enabled.
What is the meaning of the "/V+T" suffix in DS1091LUB-025/V+T?
The "/V+T" suffix in DS1091LUB-025/V+T indicates three qualifications: "/V" denotes AEC-Q100 automotive temperature grade (-40°C to +125°C); "+" signifies lead(Pb)-free and RoHS-compliant packaging; and "T" specifies tape-and-reel packaging format (standard for automated SMT assembly). All three attributes are verified and guaranteed for DS1091LUB-025/V+T.
Can the DS1091LUB-025/V+T operate outside the 3.0V–3.6V supply range?
No - the DS1091LUB-025/V+T is specified and characterized only for 3.0V to 3.6V operation. Absolute maximum ratings allow VCC up to +6.0V, but functional operation outside 3.0V–3.6V is not guaranteed. Below 3.0V, startup may fail or frequency accuracy degrades beyond ±1.75%; above 3.6V, parametric performance and long-term reliability are not assured per the datasheet.
How is the dither rate selected on the DS1091LUB-025/V+T?
The dither rate on DS1091LUB-025/V+T is selected using the DR pin: logic high (DR = 1) selects the higher dither rate, and logic low (DR = 0) selects the lower rate. For 25.0MHz output, Table 2 defines n = 10, so dither rate equals fOUT / (2 × n), resulting in ~12.3kHz (DR = 1) or ~6.1kHz (DR = 0). The DR pin must be held static during operation.
DS1091LUB-025/V+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- EconOscillator™
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Spread Spectrum Clock Generator
- PLL:
- No
- Input:
- Clock
- Output:
- Clock
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 1:1
- Differential - Input:Output:
- No/No
- Frequency - Max:
- -
- Divider/Multiplier:
- Yes/No
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Supplier Device Package:
- 8-uMAX/uSOP
DS1091LUB-025/V+T FAQ
1.How can I place an order for DS1091LUB-025/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1091LUB-025/V+T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for DS1091LUB-025/V+T reliable?
The price and inventory of DS1091LUB-025/V+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1091LUB-025/V+T is usually 5 days.
3.What payment methods are accepted for DS1091LUB-025/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1091LUB-025/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1091LUB-025/V+T?
DS1091LUB-025/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1091LUB-025/V+T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for DS1091LUB-025/V+T?
For technical support, including DS1091LUB-025/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1091LUB-025/V+T requirements.
6.How does Aetrix verify that DS1091LUB-025/V+T is sourced from the original manufacturer or authorized distributors?
All DS1091LUB-025/V+T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DS1091LUB-025/V+T meets industry standards.
7.What is the process for return or replacement of DS1091LUB-025/V+T?
All DS1091LUB-025/V+T units undergo pre-shipment inspection (PSI). If there is an issue with DS1091LUB-025/V+T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The DS1091LUB-025/V+T part is unused and in its original packaging.
Return procedure for DS1091LUB-025/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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